Scholarlink

Background <p>Porcine reproductive and respiratory syndrome virus (PRRSV) is characterized by a high mutation rate. Although research has largely focused on PRRSV-2, the detection rate of PRRSV-1 in China is increasing. To investigate the prevalence and genetic variation of <i>NSP4</i>, a key gene in the regulation of host immunity, in PRRSV-1 in China, publicly available whole-genome sequence data and NSP4 sequences were obtained for analyses of nucleotide and amino acid homology, substitutions, and phylogenetic relationships.</p> Results <p>The nucleotide homology of <i>NSP4</i> between 32 PRRSV-1 and 8 PRRSV-2 strains ranged from 57.3 to 62.4%, and the amino acid homology ranged from 58.6 to 64.5%. Among the 32 PRRSV-1 strains, the nucleotide homology of NSP4 ranged from 75.4 to 100.0% and the amino acid homology ranged from 81.3 to 100.0%. Comparisons of NSP4 amino acid sequences of 32 PRRSV-1 and 8 PRRSV-2 strains revealed a deletion at the 83rd amino acid residue in PRRSV-1 and mutations at various amino acid residues. A phylogenetic analysis showed that the PRRSV-1 strains isolated in China clustered into four subgroups of Subtype I Global: Amervac-like, BJEU06-1-like, HKEU16-like, and NMEU09-1-like strains.</p> Conclusion <p>PRRSV-1 NSP4 exhibits similarities to Subtype I Global strains and clusters into four subgroups. Although it differs from PRRSV-2 NSP4 with a deletion in the 83rd amino acid residue, the amino acid residues of the catalytic triad are conserved. These findings have important implications for the development of secure and reliable detection methods as well as new drugs and vaccines and are expected to guide further research on PRRSV-1.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Genetic variation in NSP4 of type 1 porcine reproductive and respiratory syndrome virus in China

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年5月26日

查看全文
  • Huiyang Sha,
  • Xiaolin Lan,
  • Zhiyu Yang,
  • Chen Lv,
  • Hang Zhang,
  • Qin Luo,
  • Yajie Zheng,
  • Gan Li,
  • Weili Kong,
  • Liangzong Huang,
  • Jun Ma,
  • Mengmeng Zhao

摘要

Background

Porcine reproductive and respiratory syndrome virus (PRRSV) is characterized by a high mutation rate. Although research has largely focused on PRRSV-2, the detection rate of PRRSV-1 in China is increasing. To investigate the prevalence and genetic variation of NSP4, a key gene in the regulation of host immunity, in PRRSV-1 in China, publicly available whole-genome sequence data and NSP4 sequences were obtained for analyses of nucleotide and amino acid homology, substitutions, and phylogenetic relationships.

Results

The nucleotide homology of NSP4 between 32 PRRSV-1 and 8 PRRSV-2 strains ranged from 57.3 to 62.4%, and the amino acid homology ranged from 58.6 to 64.5%. Among the 32 PRRSV-1 strains, the nucleotide homology of NSP4 ranged from 75.4 to 100.0% and the amino acid homology ranged from 81.3 to 100.0%. Comparisons of NSP4 amino acid sequences of 32 PRRSV-1 and 8 PRRSV-2 strains revealed a deletion at the 83rd amino acid residue in PRRSV-1 and mutations at various amino acid residues. A phylogenetic analysis showed that the PRRSV-1 strains isolated in China clustered into four subgroups of Subtype I Global: Amervac-like, BJEU06-1-like, HKEU16-like, and NMEU09-1-like strains.

Conclusion

PRRSV-1 NSP4 exhibits similarities to Subtype I Global strains and clusters into four subgroups. Although it differs from PRRSV-2 NSP4 with a deletion in the 83rd amino acid residue, the amino acid residues of the catalytic triad are conserved. These findings have important implications for the development of secure and reliable detection methods as well as new drugs and vaccines and are expected to guide further research on PRRSV-1.